Bowl mounting



R. G. LE TOURNEAU BowL MOUNTING Apn'l zo, 1943.

Filed April l' 1941 2 Sheets-Sheet 1 INVENTOR. jg G. Leburnew Y. MM

A TTORNE YS 2 Sheets-Sheet 2 INVENTOR.

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ATTORNEYS R. G. LE TOURNEAU BOWL MOUNTING Filed April l, 1941 April Z0, 1943.

M Q l E PatentedApr. 20,1943

BOWL MOUNTING Robert G. Le Tourneau, Peoria, Ill., assignor to R. G. Le Tourneau, Inc., a corporation of California Application April 1, 1941, Serial No. 386,281

l2 Claims.

This invention relates to earth carryingv scrapers, and in particular is directed to an improved mounting Ior the movable or rear bowl of a telescoping type scraper such as is shown, for example, in my United States Letters Patent No. 2,229,193, dated January 21, 1941.

In the scraper shown in the above identiiled patent the rear or sliding bowl was supported at the back end by laterally disposed rollers mounted adjacent the top of the bowl and riding horizontal side beams of the scraper frame, the forward end of said sliding bowl being supported solely by engagement of its blade with the bottom of the fixed or forward bowl. While the above described bowl mounting of the previous structure functioned as intended, it has been found desirable, and it is my principal object to provide, a mounting between the scraper frame and sliding bowl which supports the latter, independently of the stationary front bowl, for straight line motion, accomplishing smoother operation and reducing friction and wear between the engaged portions of the telescoping bowls.

Another object of the invention is to' provide a unique connecting unit between the longitudinally spaced frame engaging rollers and each side of the sliding bowl, a portion of each unit projecting through a longitudinal slot in the corresponding side plate of the scraper frame, and

the unit being constructed so as to avoid undue elongation of the slot.

An additional object of the invention is to provide a bowl mounting which includes means to prevent ready access oi earth from the bowl into the channel in which the bowl mounting or supporting carriages ride.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purpose for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

ln the drawings similar characters of reference indicate corresponding parts in the several views:

Figure 1 is a fragmentary side elevation of a scraper embodying the invention and showing one of the bowl supporting carriages.

Figure 2 is an enlarged sectional plan view on line 2--2 of Fig. 1 showing one of the bowl supporting carriages as connected with the rear or sliding bowl of the scraper.

Figure 3 is a sectional elevation taken intermediate the sides of the bowl.

Figure 4 is an enlarged cross section on line #2lof Fig. l.

Referring now more particularly to the characters of reference on the drawings, the scraper here shown is of substantially the same type and general construction as shown in the above identiiied patent, and includes a rigid frame indicated generally at l supported at the rear end by transversely spaced wheels 2. The frame includes spaced sides which comprise a number of longitudinally extending parallel beams 3 backed by side plates il, the forward portion of the latter depending to form the sides of a stationary bowl 5 formed in and supported by the frame.

A rear bow1 indicated generally at 6 is disposed ior telescoping movement relative to the stationary bowl 5; such rear bowl 8 including sides l, and a bottom 8 having a blade 9 at its forward edge in cooperating relation to the bottom of bowl 5. However, in this structure' the blade 9 does not carry the weight of the forward end of bowl 6 as previously.

A power actuated tail gate l0 forms the back of bowl 6, and the latter moves to and fro under the influence of the tail-gate in the same manner as in the previous structure.

The mounting for the rear or sliding bowl 5 is the essence of this invention, and such mounting comprises the following structure.

carriages which comprise a heavy duty bar I l tted at opposite ends with rollers i2, ride between vertically spaced ones of the side beams 3 on both sides of the scraper; these carriages being relatively long, and the rollers l2 of such diameter that there is a minimum of vertical play between the rollers and said ones of the side beams 3. Such beams 3, with the adjacent portion of side plates 4, form channels C in which said carriages run with an easy fit.

The carriages are connected intermediate their ends with the bowl S by means of spacer plates or blocks I3 which are elongated and xed between bars i l and the bowl sides '1, adjacent the rear end of the latter, by means of bolts i4; these spacer blocks being of such thickness that bowl sides l clear the side plates 4 of the frame by the desired amount.

In order that the bowl 6 may telescope bowl 5, the side plates 4 are slotted as at I5, and through which slots spacer blocks I3 extend; the length and relative longitudinal position of these slots being such as to permit of the desired upward travel of the bowl. By positioning the spacer vvent earth from entering slot portion I6, the

sides 1 of bowl 6 are provided with forwardly projecting wings or shields I'I which are disposed close to and lap said slot portion when the bowl 6 is fully retracted relative to bowl 5. These wings are beveled lengthwise, so that the dirt engaged thereby will be deflected into the bowl,

which has relatively thick sides as shown.

The bowl 6 at its rear is maintained in proper transvlerse alinement by means of rollers I8 mounted on the ends of a cross beam I9 formed with the bowl; theaxis of said rollers being vertical and the rollers riding the side plates 4 above slots I5.

By reason of the above described bowl mounting it will be seen that the bowl 6 can be moved forwardly and rearwardly smoothly, without binding relative to bowl 5, and without substantial wear on blade 9. In addition, it is impossible for the forward end of bowl 6 to tilt or raise vertically relative to bowl and which otherwise might undesirably occur under certain operating conditions. In other words, the bowl mounting, as above, assures unrestricted straight line movement of the rear bowl 6 in non-tilting relation to the scraper frame and to the forward bowl 5.

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects-of theiinvention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention, what I claim as new and useful and desire to secure by Letters Patent is:

1. A bowl mounting for a scraper bow1 disposed for longitudinal movement between the sides of a scraper frame, said sides including longitudinally extending frame beams; said bowl mounting comprising a relatively long carriage extending along each side of the bowl non-tiltably supported by and movable along said beams, and means rigidly connecting the carriages with the adjacent sides of the bowl; each carriage including longitudinally spaced, beam engaging, anti-friction members, one disposed adjacent the transverse plane of the front of the bowl, and another disposed adjacent the transverse plane of the rear of the bowl.

2. A bowl mounting for a scraper bowl disposed for longitudinal movement between the sides of a scraper frame, said sides including longitudinally extending frame beams; said bowl mounting comprising a relatively long carriage on each side of the bowl non-tiltably supported by and movable along said beams, the carriages being spaced laterally from the bowl sides, spacer blocks between the carriages, intermediate the ends of the latter, and sides of the bowl, and means securing corresponding carriages, bowl sides and spacer blocks in rigid connection; each carriage including longitudinally spaced, beam engaging, anti-friction members, one disposed adjacent the transverse plane of the front of the bowl, and another disposed adjacent the trans verse plane of the rear of the bowl.

3. A bowl mounting for a scraper bowl disposed for longitudinal movement between the sides of a scraperfframe, said sides including vertically spaced parallel frame beams extending longitudinally of the scraper; said bowl mounting comprising roller carriages disposed between said vertically spaced-frame beams on both sides of the bowl, the `carriages riding one beam and being closely disposed relative to the other, and means rigidlyconne'cting the carriagesvwith the adjacent side ofthe bowl; each of said carriages including a relatively long bar supported by front and rear rollers, said rollers being spaced apart a substantial` distance longitudinally of the bar.

4. A bowl mounting for a scraper bowl disposed for longitudinal movement between the sides of a scraper frame, said sides including vertically spaced parallel frame beams extending longitudinally of the scraper; said bowl mounting comprising roller carriages disposed between said vertically spaced frame beams on both sides of the bowl, the carriages ridingI one beam anci being closely disposed relative to the other, and means rigidly connecting the carriages with the adjacent side of the bowl; each carriage including a relatively long roller supported bar, and said last named means including spacer blocks engaged between said bars and the sides of the bowl. f

5. A bowl mounting for a scraper bowl disposed for longitudinal movement between the sides of a scraper frame, said sides including longitudinally extending frame beams, and side plates backing said beams; said bowl mounting comprising roller carriages disposed laterallyof the sides of the bowl and supported by said side beams outwardly of said side plates,v the latter, being slotted lengthwise adjacent the carriage and for a predetermined distance, and means extending through said slots and rigidly connecting the carriages and adjacent sides of the bowl; said carriages being elongated and including longitudinally spaced, anti-friction beam engaging members, and said means connecting with the carriages intermediate the ends of the latter.

6. A bowl mounting as in claim 5 in which the slots are of a length greater than that the bowl travels; said means connecting with the sides of the bowl adjacent the back of the latter whereby to minimize the extent of projection of the slots beyond the front of the bowl.

7. A bowl mounting for a scraper bowl disposed for longitudinal movement between the sides of a scraper frame, said sides including longitudinally extending frame beams, and side plates backing said beams; said bowl mounting comprising roller carriages disposed laterally of the sides of the bowl and supported by said side beams outwardly of said side plates, the latter being slotted alongside the path of the carriages, means extending through the slots and rigidly connecting the carriages with the bowl, said slots when the bowl is retracted extending ahead of the forward end of the bowl, and forwardly projecting shields mounted on the forward end of the bowl and closely overlying the extending portion of the slots when the bowl is retracted.

8. A bowl mounting for a scraper bowl disposed for longitudinal movement between the sides of a scraper frame, said sides including vertically spaced parallel frame beams extending longitudinallyof the scraper; said bowl mounting comprising roller carriages disposed between said vertically spaced frame beams on both sides of the bowl, the carriages including elongated roller supported bars, the rollers riding one beam and being closely disposed relative to the other, and means rigidly connecting the carriages with the adjacent side of the bowl.

9. In a scraper, a front bowl, a rear bowl disposed to telescope the front bowl, a scraper frame including side beams disposed alongside said bowls, and means independent of the front bowl non-tiltably supporting the rear bowl from said side beams for straight line movement relative to said front bowl.

l0. In a scraper, a front bowl, a rear bowl disposed to telescope the front bowl, a scraper frame including side beams disposed alongside said bowls, and means independent of the front bowl non-tiltably supporting the rear bowl from said side beams for straight line movement'relative to said front bowl; said means comprising roller carriages riding said side beams, and connecting members between the carriages and the :'ear bowl, the carriages being elongated and ach having beam engaging rollers spaced apart ongitudnally a substantial distance.

11. In a scraper, a front bowl, a rear bowl disposed to telescope the front bowl, a scraper frame including vertically spaced parallel frame beams extending alongside said bowls, and means nontiltably supporting the rear bowl from said side beams for straight line movement relative to said front bowl; said means comprising elongated roller supported carriages disposed between said vertically spaced side beams, the rollers riding one beam and being closely disposed relative to the other.

12. A bowl mounting for a scraper bowl disposed for longitudinal movement between the sides 'of a scraper frame, said sides including vertically spaced parallel frame beams extending longitudinally of the scraper; said bowl mounting comprising elongated carriages mounted in relatively non-tiltable connection with the sides of the bowl and riding between said vertically spaced parallel frame beams, said beams being spaced apart a distance to prevent tilting of the carriages in a vertical plane. l

ROBERT G. LE TOURNEAU. 

